What does a rank voucher do? (OneBlock Glacier)

Hi, just checking does the rank voucher gives you the permanent rank of the respective ranks? [Rabbit Rank Voucher gives you permanent Rabbit rank in the OneBlock Glacier with full Rabbit Rank Benefits] Or Is the Rank Temporary {expires after a certain amount of time)

permanent rabbit perms

You get the rank with every perk forever. But if you redeem a rank from a voucher, you cannot upgrade your rank at /store. Because the store does not know that you redeemed a rank voucher and assumes that you do not have a rank.

Oh, I see, thanks!